Reversible friction-ring washer



FIG. 1 is a top plan view of a reversible friction-ring washer, showing my new design;

FIG. 2 is a side-elevational view taken from the bottom of FIG. 1;

FIG. 3 is a side-elevational view taken from the right of FIG. 1;

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a reversible friction-ring washer, as shown and described. 